Final answer:
Option C best supports the theme of mortality and the apprehension toward the unknown in death, expressing the character's fear of what might come after life and how this fear can lead one to bear present sufferings.
Step-by-step explanation:
The quote that best supports the answer to Part A about the theme of mortality and the fear of the unknown in death is option C: "The undiscovered country, from whose bourn / No traveller returns, puzzles the will, / And makes us rather bear those ills we have / Than fly to others that we know not of?" (Lines 24-27). This excerpt highlights the central dilemma of the character, contemplating death as an escape from life's suffering, yet hesitating due to the fear of what lies beyond death, the mysterious "undiscovered country." The fear of the unknown aspects of death can immobilize and cause individuals to endure their current hardships rather than risk facing potential greater unknowns in death.